### Check for existing issues

- [x] I have searched the existing issues and checked that my issue is not a duplicate.

### What happened?

If users created by bulk invite the given access tokens in the response csv doesn't have a `sk-` prefix and getting rejected on any call.

### Steps to Reproduce

1. create users by bulk invite csv upload 2. Download the credentials file containing Virtual Keys and invitation links. Users will need these Virtual Keys to make LLM requests through LiteLLM. 3. {"error":{"message":"Authentication Error, LiteLLM Virtual Key expected. Received=d204****fd5c, expected to start with 'sk-'.","type":"auth_error","param":"None","code":"401"}}

### Relevant log output

```shell

```

### What part of LiteLLM is this about?

UI Dashboard

### What LiteLLM version are you on ?

v1.83.10

### Twitter / LinkedIn details

_No response_